The research effort outlined the application of a computer aided design (CAD)-centric technique to the design and optimization of solid rocket motor Finocyl (fin in cylinder) grain using simulated annealing. The proper method for constructing the grain configuration model

ballistic performance and optimizer integration for analysis was presented. Finocyl is a complex grain configuration

requiring thirteen variables to define the geometry. The large number of variables not only complicates the geometrical construction but also optimization process. CAD representation encapsulates all of the geometric entities pertinent to the grain design in a parametric way

allowing manipulation of grain entity (web)

performing regression and automating geometrical data calculations. Robustness to avoid local minima and efficient capacity to explore design space makes simulated annealing an attractive choice as optimizer. It is demonstrated with a constrained optimization of Finocyl grain geometry for homogeneous

isotropic propellant

uniform regression

and a quasi-steady

bulk mode internal ballistics model that maximizes average thrust for required deviations from neutrality.